COLLECTION OF BORNEAN MOSSES. 311 
mutatis infra sensim elongatis collenchymatice rectangularibus, infimis 
elongate laxe rectangularibus, parietibus rectis tenuibus firmis composita. 
Dioicum ; flos femineus terminalis, foliis perichzetialibus numerosis, eis 
caulis longioribus patentibus comam formantibus ; archegonia numerosa, 
(20 vel supra) elongata, perangusta, paraphysibus plurimis æquilongis 
tenerrime filiformibus confertissime intertextis. Cetera desiderata. 
Hab. Rundum, 7 May, 1913, leg. E. О. Rutter, D.O. (No. 227). 
A remarkable plant, which with its homomallous deflexed leaves, entire 
absence of lamellæ, and want of fruit, has little to indicate its affinity with 
Atrichum beyond its characteristic stem- and nerve-section, and the general 
texture and build of its leaves. The areolation also is very peculiar, and 
recalls some species of the Hepaticæ, or certain austral species of Pterygo- 
phyllum. 
POGONATUM BORNENSE, Thér. & Dixon, sp. nov. (PI. 27. fig. 13.) 
E minoribus generis. Caulis simplex, cirea 1 em. altus ; folia caulina 
densiuseula, suberecta, apice incurvo, siceitate arcte incurva, 3 mm. longa, 
e basi subpellucida parum latiore breviter late oblonga (circa 1 mm. lata), 
obtusa, concava ; comalia seu perichætialia longiora (5 mm.), angustiora, 
omnia marginibus erectis, e medio conferte grosse obfustuscule, prope apicem 
argutius geminatim denticulatis. Costa angusta, male limitata, ad basin rufa, 
supra obscura, circa À latitudinis folii, elamellosa, dorso levis. Areolatio ad 
basin e cellulis longe lineari-rectangularibus pellucidis, parietibus tenuibus, 
composita, cellulis laminze obscuris quadrato-rotundis 16-20 ш latis, parietibus 
hic illie, precipue ad angulos incrassatis, ad marginem superiorem folii sepe 
fusco-purpureis. Seta 2 cm. alta, pallide rufa, tenuiuscula ; theca sub- 
inclinata, parva, oblonga, orificio lato, fusco-viridis, obscure 6-angulata, 
operculo magno, purpureo, brevi-rostellato. Calyptra pilis densis albidissimis 
obtecta. 
Hab. Sandakan, 25 Apr., c.fr. (No. 47), leg. Binstead. 
Distinct from all other known species but P. marginatum, Mitt. in the 
entirely elamellose leaves ; P. gymnophyllum, P. proliferum, P. Warburgu, 
which have the lamellae very much reduced and confined to the surface of 
the nerve, differ also in the taller habit with loose flexuose foliation. 
Р. marginatum, Mitt., from Ceylon, differs entirely in the much more robust 
habit (stems 5 cm. high or more, leaves lax, flexuose when dry, 5 mm. long), 
the leaves scarcely at all widened at the base, with the cells remaining short 
and chlorophyllose, scarcely differentiated, in the basal part, the margin 
bistratose throughout, almost or quite to the very insertion, and the hairs of 
the calyptra brown. 
A note on one or two specimens of these allied plants may be added. 
A plant issued by Levier as * P. hexagonum, Mitt., Sikkim-Himalaya ; 
